ASTM B686/B686M-10

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Designation: B686/B686M – 10
Standard Specification for
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Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B686/B686M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* Molten Forms for Castings from All Casting Processes
B275 Practice for Codification of Certain Nonferrous Met-
1.1 This specification covers aluminum-alloy high-strength
als and Alloys, Cast and Wrought
castings designated as shown in Table 1.
B557 Test Methods for Tension Testing Wrought and Cast
1.2 Castings covered by this specification are intended for
Aluminum- and Magnesium-Alloy Products
use in airframe, missile, and other critical applications where
B557M TestMethodsforTensionTestingWroughtandCast
high strength, ductility, and sound castings are required.
Aluminum- and Magnesium-Alloy Products (Metric)
1.3 Alloy and temper designations are in accordance with
B660 Practices for Packaging/Packing of Aluminum and
ANSI H35.1/H35.1 (M). The equivalent Unified Numbering
Magnesium Products
System alloy designations are in accordance with Practice
B881 TerminologyRelatingtoAluminum-andMagnesium-
E527.
Alloy Products
1.4 Unless the order specifies the “M” specification desig-
B917/B917M Practice for Heat Treatment of Aluminum-
nation, the material shall be furnished to the inch-pound units.
Alloy Castings from All Processes
1.5 For acceptance criteria for inclusion of new aluminum
D3951 Practice for Commercial Packaging
and aluminum alloys and their properties in this specification,
E29 Practice for Using Significant Digits in Test Data to
see Annex A1 and Annex A2.
Determine Conformance with Specifications
1.6 Units—The values stated in either SI units or inch-
E34 Test Methods for ChemicalAnalysis ofAluminum and
pound units are to be regarded separately as standard. The
Aluminum-Base Alloys
values stated in each system may not be exact equivalents;
E94 Guide for Radiographic Examination
therefore,eachsystemshallbeusedindependentlyoftheother.
E155 Reference Radiographs for Inspection of Aluminum
Combining values from the two systems may result in non-
and Magnesium Castings
conformance with the standard.
E165 PracticeforLiquidPenetrantExaminationforGeneral
1.7 This standard does not purport to address all of the
Industry
safety concerns, if any, associated with its use. It is the
E527 Practice for Numbering Metals and Alloys in the
responsibility of the user of this standard to establish appro-
Unified Numbering System (UNS)
priate safety and health practices and determine the applica-
E607 Test Method for Atomic Emission Spectrometric
bility of regular limitations prior to use.
Analysis Aluminum Alloys by the Point to Plane Tech-
2. Referenced Documents
nique Nitrogen Atmosphere
E716 Practices for Sampling and Sample Preparation of
2.1 The following documents of the issue in effect on the
Aluminum and Aluminum Alloys for Determination of
date of purchase form a part of this specification to the extent
Chemical Composition by Spectrochemical Analysis
referenced herein:
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E1251 Test Method for Analysis of Aluminum and Alumi-
2.2 ASTM Standards:
num Alloys by Atomic Emission Spectrometry
B179 Specification for Aluminum Alloys in Ingot and
IEEE/ASTM SI 10 Standard for Use of the International
System of Units (SI): The Modern Metric System
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2.3 AMS Standard:
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This specification is under the jurisdiction of ASTM Committee B07 on Light
AMS 2771 Heat Treatment of Aluminum Alloy Castings
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
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2.4 ANSI Standards:
Aluminum Alloy Ingots and Castings.
Current edition approved Nov. 1, 2010. Published December 2010. Originally
approved in 1981. Last previous edition approved in 2008 as B686/B686M – 08.
DOI: 10.1520/B0686_B0686M-10.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001, http://www.sae.org.
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Standards volume information, refer to the standard’s Document Summary page on Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,
the ASTM website. Arlington, VA 22209, http://www.aluminum.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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